In the study, it was aimed to determine the qualitative parameters which are used to classify the chick’s quality after hatching and to investigate the effects on the fattening performance during 35-42 day fattening period. In the experiment, one day old 400 chicks (200 male and 200 female) were allocated into two groups (one control+one treatment), each group had five subgroups with 40 chicks (20 male+20 female) At the beginning of the experiment, a sex discrimination was made on chicks and then divided into two different (high and low quality) groups. While the gender and quality classified chicks were being grouped, the groups were formed as the live weights were closer to eachother in order to eliminate the diffreneces depending upon the initial body weights. The chicks were fed with 3 different diets to meet the nutrient requirements that vary according to their period. The chicks were kept total 5 weeks in trial, feed and water were given as ad libitum. The chicks were weighted weekly to calculate body weight gain, feed conversion rate and feed intake. The results obtained from this study showed that, the differences of initial body weights between the groups were statistically significant (P0.05). The differences in the feed conversion rates between the groups at the 4th week were statistically significant(P<0.05). According to the data of hot carcass weight,cold carcass weight, abdominal fat weight, carcass yield and abdominal fat ratio after the slaughter, the difference between groups in male gender is not statistically significant but ın female gender, only abdominal fat ratio was statistically significant among the groups (P<0.05).We are grateful to the Çukurova University Scientific Research Projects Unit for their
financial support to this project (Proje No: FLY-2018-9946)
